Ion-select OK button does not appear

Ionic Framework ionic-v3
1

ion-select has no OK button. It just not appear.
This is in a 3.9.2 browser app.
Also, ionChange does not fire.

<ion-item>
   <ion-label>Gender</ion-label>
   <ion-select  #sectionSelect okText="Okay" cancelText="Dismiss" [(ngModel)]="genderSelect" (ionChange)="genderSelected(genderSelect)">
                      <ion-option value="f">Female</ion-option>
                      <ion-option value="m">Male</ion-option>
     </ion-select>
</ion-item>